gcc/testsuite/objc.dg/ivar-visibility-2.m

/* Test instance variable visibility.  */
/* Author: Dimitris Papavasiliou <dpapavas@gmail.com>.  */
/* { dg-do compile } */
/* { dg-additional-options "-fivar-visibility=protected -Wno-objc-root-class" } */
#include <objc/objc.h>

@interface MySuperClass
{
    int someivar;
}
@end

@implementation MySuperClass
@end


@interface MyClass : MySuperClass 
@end

@implementation MyClass
@end

@interface MyOtherClass
- (void) test: (MyClass *) object;
@end

@implementation MyOtherClass
- (void) test: (MyClass *) object
{
  int a;

  a = object->someivar;   /* { dg-error "instance variable .someivar. is declared protected" } */
}
@end